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` "A, REEVES? LIFTIN'Q'. JACK A originalril .9. i922 2 sheets-Suas: 1'

., v I gnuenfoz n 11m attoz'ngq I i Re; 16,806

eissued Dec. 6, 1927.

.UNITED STA T Es PME-N Rnnvlis, or SHALL HEATH, BIRMINGHAM, ENGLAND, AssiGNoR'oR ONE- Y HAI.: To GEORGE HERBERT c UMING 4BUTLER, or BIRMINGHAM, ENGLAND.

. 4"original No. 1,584,992, dated Aprn s1, message f The resent invention has relation to lifting jac of the type involving a-lazy tongs construction and w lich are particularly smt-` able for raising the motor earsand like ve- '6 hicles, and has for its object .to provide a jack o'f simple construction and eilieient :1ction'and which is cheap to manufacture.l

Accordingr to the-present invention .a dou-'- lble toggle lever or lazy'tongs construction-is.

1Q mounted upon a suitable base and is adapted tube extended or contracted by a rod having left,` and right hand 'Screw threads engaging respectively opposite pivot points of the sald double toggle lever or lazy tongs construction. The invention further comprehends improved handle operating means 'for lifting )acks hereinafter described and claimed:

In order that this invention maybe clearly `understood and readil -carried into practice, reference 'may be hm. to the appended ex plan'atory sheet of drawings, upon which: Figure l'is a frontv elevation and i Figure 21s an edge elevation of a lifting jack construction. according te the present mvention. j

' Figure 3 is a fragmentary perspective view of an operating handle constructedl according to the present invention in the 'colla sed condition. i

igurel; is a fragmentary perspective view 'of the' same handle in the extended condition andl v Figure 5;is a fragmentary elevation of the handle tion. 1. l an embodiment of the. present inven- [tion the double toggle lever"construction is mounted uponl a suitable. base l'ilalte'l and virtually constitutes a lar/Ly tongs construetion which is adapted to lie-'opened or extended for the lifting operation. 'Two pairs l'an'dj3 of lower toggle levers have their lowest extremities suitably pivotod tomthe base plate 1 a short distance apart, andl these' pairs ofdual toggle levers cross one an@ other at apoint not far removed fromthe lbase and extend obliqnely npwa'rdlywhcn `the ldevice `is extended. Conveniently the pair of. levers 2are mounted between the opposite pair of levers 3 and" said inner le" vers v2 -have an arc-shaped slot 4 adapted to- 1 accommodate a transverse, pinI 5 uuitingthe adjacent toggle levers, the arrangement'bereissue "led December `21,

vlevers 2and 3 ane conveniently pivoted to the illustrating `parts in'longitmlinal seeuniversal jolnt'ilG and a square socket mem- .otally united at a short distance from t ieir '.23 o this U-shaped member'is extended ver- RIFTING nox,

ing such 'that the pin operates in the slot in 55 the extendingor collapsing' operationof the jack. The corresponding levers may be strengthened by further `transverse uniting f pins 6 and 7. The lower extremitiesof the e0 limbs of Uy lor' channel shaped members 8 which-are suitably secured to a sheet metal or other base 1 a. short distance apart. These Usshaped or vchannel membersmay be. permanently connected-to the base by passing the limbs `through slots in the base and accommodating :the connecting lpart beneath the said'base which is of a shallowgtrough formation for thisl purpose. Alternatively the U; or channel lshaped strips may be vriveted, ybolted or-otherwise vsecured 'to the base.

'lhe upper extremitiesof the lower toggle levers .2 and 3 are pivotally connected to ,two

pairs of upper toggle levers 9 and 10 which cross vone another #andare interlnediately pivoted' lat 1p1 being Vdiagonally `disposed when the. jack islgi'n the extended position.

These Auppertog, \;le levers eachl involve two corresponding links 9 and 10 pivoted to t-he upper extremity of the lower toggle leversv 2 and 3 and blocks or bearing pieces 12 are pivotal? mounted at the junction of the upper au lower toggle lever system, and a rod 13 is adapted to pass throughy such blocks or bearing pieces having left and righthand screw threads'lft an'd l5 'whieh' engage corresponding internal screw tl'ireads in the said blocks 12er bearing pieces. The f extremity of this v`rod is provided with a .operating'rod with a handle such as that lnneinafter described. The upper toggle levers 9, 10 as aforestated are crossed and iv- .uppergextreinitiesiand may-suitably be braced by. 'crosspins 18, and sald upper'. toggle levers at their extreme upper ends carry two .pairs f short upper "links 19, 20.v which are pivoted tol the said up r toggle levers and at their other extremities pivote'd to a small *transverse shaft 2L 'A horizontal platform 22 involving a U-shapedmember is also v iv# otall mounted dpon this shaft and one 1mb tically downwardly and is longitudinally slotted and adapted to engage the axis pin ll which uniti-s lshe-uppertoggle levers 9, 1() n tes."The platform may have a' smallplate -or- 'disc24 pivoted'orrevolubly mounted cen# 1 5 ing the pivot aforementionedl of the Vupper toggleflevers, the sa-id platform is always re-l tained in a vertical position. Furtherthe horizontal operating rod13 ofthe apparatus [always remains in ay horizontal position in the opera-tion of the jack, and .the arrangement is such thatwhen ytheljacki'scompletely collapsed vsame occupies a very little space, the upper andlower toggle levers `ly-' v ing in substantial ad'acency,-w1th lthe-h'orizontal rod, thev slotte limb part of the-plat-A form bei [accommodated betweenfthefnow side b si e` upper and:.lower.'toggleljleversfj vThe s ot and pin mechanism of.4-and-oftheV lower toggle links is ad apted-`to positively'` '30 limit' the extension and contraction ofthe jack. A suitablehandle for operating th 26 of square section which are pivotally united so that they maybe brought into valig'nment'or pivoted into adjacency `with one anotheras'shown in Figures 3 and 4 re-` 1"'spectively.. To this end the rod 26-is` prof vided at itsv extremity vwith -a vhollow tube in or housi 27 of square section and this housing w ich is o en at its rejecting extremit-y is provide side of the housing-27, one limb of each slot extends along the rejecting lu or ear 29 and the other lim along the ousing or i hollow` tube 27. The adjacent extremity of l the other rod nions as shown in theigure v5. -The hinge operates as follows.

00 Whex'r it is desired tohave the parts 25 a1d 26 of, the rod in rigid alignment for operation of thefjack (Figures 4 and 5) that part of the rod carrying the trunnions 30 isk slid into the-housing 27, its projections moving 0l along the slots in such housing and the .-extendiacksj is comprisedof two lengths of rod 25:'-and' l seenthatv an-operating.. rod is provided which is ofa collapsible character, and the' handle" with two "aterally @prop -V {ecting lugs or ears 28. An'. L or equivaently shaped slot 29 is provided upon each a rtr-26v is introduce-d 'into Vthe '5o housing 27' an is provided with two voppo tive or other effort can' be imparted to' the jack. when itis desired @bring-www0:

parts 25 and 26 intocadjacency, the rod part carrying the projections or trunnions v3() is slid fromout the housing and the Vprojections caused tomove inthe slots 2 9 into .thc 'i projecting lugs carried byA the `said heus lng, and 1n this position t e two rod parts, -which are conyeniently of 'a similarlength can be brought into adjacenc Two handle parts 32 and 33 are pivote to the rod 26 carrying the housing atI the o posite extrem'- ity-of` such rod. Each hand ey part is referably stamped'upto a substantially section and its extremity slot-ted between the llimbs of -the U-formationand said-limbs`- areV passed one on each side .ofI the rod26 andare pivotallyy connected :thereto byra rivet or pin y-34'zpassingvtlirou h .the four -limbs VY'and the slotted parts' of eachfihandle to limit theiropenin movement whenthey are extended'toa dleis collapsed, the two lparts 32 and 33 are brought into adjacency, and on yaccount of their hollow or substantially 4U-section they completely enclose' Vthe extremitiesof `the =rodS 23and 2'6f a`sf. sl1\own jin the Figure 3l part is ada ted to fold to hold the parts` of through therod.l he rod atits extreme end is provided with a small; projecting central tonguev 3 5 ,"this is adapted tol-.bear against i oov construction. When the .han--l lllh i the rod in t ecollapsed condition, the whole apparatus occupying a very little space, and

being readily stored in a tool box or like container in. a vehicle. Instead of employ- -ing a square 'section rod, circular, ovalor other section rod or barmaybe em loyed being 'suitably adapted at its extremity'for engaging `the usual square socket in the lifting.l jack. 'Ihe part 32 of the U-section handle may be partially closed at its extremity as shown at 36 and the opposite part 0r limb which adapted. to embrace the major part number of yrecesses 37 adapted to cooperate of the two rods when folded may be left'f I with a spring controlled stud device carried by the squaresocket 38 on the jack.

Other modes of applying the principle my invent-ion may b e employed insteadof vthe oneV explained, :change being made as regards the mechanismherein disclosed, prov1 ed themeans stated by any of the following claims orfthe equiva e stated means be employed.

1. In a lifting jack, a base element, lazy tongs comprising alower set of crossed links pivotally 'mounted at their lowerends lon platformon the upper stationary pivots on said base element, a

lseries of linksof progressively diminishing f bzysc clement, lazy tongs having crossed links pivotally mounted at their lower ends on said base clement, several pairs of other links, one pair 'being pivotally connected to the upper ends -ot' said first named links, means for extending and collapsing said links and interengaging elements on the lower overlapping portions ofsaid two first' named links adapted solely by their interengagen'ient with each other to cause said two first named links to have equal angular displacement and to be ,maintained at the ame angular relation to the planeofl said ase.

B. vIn a lifting jack, the combination of a base element, lazy tongs having a pair of crossed linkspivotally mounted at their lower ends on said Abase element, several pairs of other links, one pair being pivotally connected to the upper ends of said first named links, means for extending and collapsing said links, a platform on the upper `portion of the lazy tongs havinga downwardly extending arm pivotallyl connected to said tongs and having a vertical slot, a.` connecting pivot pin on the lazy tongs adapted to operate in said slot, and interengaglng elements on the lower overlapping portions of said two first named links adapted solely by their interengagement with each otherv to cause said two first named links to have equal angular displacement and to be main# tained at the same angular relation to the plane of said base. L

4. In a lifting jack,.the combinations of` a hase element, lazy tongs having .links pivotally mounted at their lowerends on said base element, several pairs of other links, one pair being pivotallyconnected to the upper ends of said first named links,

parted thereto when actuated by saidfoperf means for extending and 'collapsing said.

links, o ne of said first 'named links having a curved slot thereinl and the other thereo having an element movably engaging in said`V- slot and serving to thereby maintain said links at equal angles to'the plane of said base, irres ective of the angular elevation of said 1i s.

' 5. In a-lifting jack, the combination of a base element, lazy tongs having-links pivotally mounted atl their lower ends on said base element, several pairs of other links, one pair being pivotally connected tothe upper ends of said vfirst .named links, means for extending and collapsing said links, one of said first najmed links having an extension and a curved slot extending into said extension. and the other thereof having any element movably engaging in said slotand serving totherebymaintain said links at l equal angles to theplane Aof said base irrespectivo of the angular Aelevation of said v links.

6. 'In a lifting jack, the combination of a base element, a lower set ofcrossed links pivotally mountedat their `lower ends on said base element, an upper set of links nev pivotally connected at theii` lower ends to the upper ends of sai'd'ii-rst set .of links, operating means for extending andvcollapsing said links and means comprising interengaging elements on the overlapping portions of said crossed links adapted solely by their interengageinent with each other to cause the crossed linksto have equal angular displacement imparted thereto when actuated by said operating means.

7 In a lifting jack, the combination of a base element, la Alower setl of crossed links 'pivotally mounted at their lower .ends on said base element, an upper set of links pivotally connected at their lower ends to the upper ends of said first set of links,

operating lneans for extending and collaps-` ing said links, and an element mounted 011 one of said crossecllinks ada ted to engage within a suitably shaped slot'ln the'other of the crossed links whereby said crossed links will have equal angular displacement ilnf ALFRED` REEVES. 

